Alarm-bell for doors



(No Model.)

J. H. WELLER. ALARM BELL FOR DOORS.

No. 480,001. Patented Aug. 2, 1892.

- JWQr NITED STATES 1 \ATENT OFFICE.

ALARM-BELL FOR DOORS.

SPECIFICATION forming part of Letters Patent No. 480,001, dated August2, 1892.

Application filed March 2, 1892. Serial No. 423,467. (No model.)

To all whom, it may concern.-

Be it known that I, J OEL H. WVELLER, a citizen of the United States,residing at Boyertown, in the county of Berks and State of Pennsylvania,have invented certain new and useful Improvements in Alarm Bells forDoors, of which the following is a specification.

This invention relates to an improved alarmbell for shop-doors,money-drawers, and in similar places, the object in view being toprovide a simple and practical arrangement whereby the bell sounds uponthe opening of the door, drawer, or other movable part, but is notaffected by the closing of the same. I also provide for throwing theparts out of operative relation when desired.

To this end the invention consists in the novel features of constructionand combinations of parts, hereinafter described and claimed.

The invention is illustrated in the accompanying drawings, in whichFigure 1 shows an inside elevation of the top portion of a door and jambwith my arrangement applied. Fig. 2 shows a vertical section of the doorand jamb with the alarm devices in side elevation. Fig. 3 is aperspective view of the bell post and hammer detached from the bell.Fig. 4 shows a section of a sliding drawer to which my improvement isapplied.

The letter A on the drawings designates a door hinged to swing inward,and B designates that portion of the jamb or casing which extends acrossthe top of the said door. A hell 0 is located above the door and mountedon a post D, having a base-plate E, which fits against the casing and issecured thereto. The hammer of the bell is made of a single piece ofwire comprising an arm F, pivoted on a pin a, which passes transverselythrough the post D and is made into a coil b at one end, whichconstitutes the clapper for striking the bell. At the opposite end thewire is formed into a loop 0, which projects outward, and the said wirethen extends back to the post, where it is wound in a coil d about thepin a and its end 6 secured in the post. It will be observed that thesaid coil (1 serves as a spring to hold the loop a inward and theclapper b consequently near the bell.

An arm or bracket G is secured to the upper part of the door and has anoutward-extending upper portion with a vertical bifurcated arm G. Aweighted trip II is pivoted in this arm and its weighted endf rests in asocket g in the inner side of the arm G, while its opposite or upper endforms a catch h, engaging in the loop 0.

The operation will be apparent. Upon opening the door the catch it drawsthe loop 0 outward, compressing the coil-spring d and moving the clapperb away from the bell, and when said catch releases the loop the clapperflies back against the bell and sounds the alarm. In closing the doorthe inner side of the catch strikes the loop and the trip moves on itspivot and passes under the said loop. When the catch has passed the endbar of the loop, the Weight f returns the trip to its normal positionwith the catch engaging in the loop. Thus no alarm is sounded by closingthe door. The arm G is secured to the door by a screw t passing throughit at the middle, and it may turn on this screw. A spring I is coiled onsaid screw and has one end secured to the arm and the other to the door.This spring holds the arm vertically. If it is desired not to have thebell ring, the arm G is turned down on its pivot "L to a position Wherethe trip can have no engagement with the bellhammer. This isaccomplished by means of a cord j, attached to the upper part of the armand running over a suitable pulley 7c,located out at one side and itsend depending and provided with a ring Z to hook over apin Z, projectingfrom the door.

Fig. 4 shows how the invention may be applied to a sliding drawer. Theletter J designates the drawer and the bell is secured to its rear sidewhile the trip-arm is attached to a suitable stationary part, such as K.The operation is the same as before, the bell sounding only when thedrawer is opened.

It will be seen my arrangement is simple, durable, and effective in itsoperation.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

a l. The combination,with a door, drawer, 0 other movable part, of abell having a pivota spring-actuated hammer provided at one end with aprojecting loop, and a stationary arm carrying a trip pivotallyconnected with it and constituting a catch at one end for engaging saidprojecting loop of the bell-hammer and at the opposite end weighted andarranged to stop against the arm, one of said partsthe bell orarmcarried by the door, drawer, or other movable part and the otherstationarily located with respect to the said movable parts.

2. The combination, with a door, drawer, or similar movable part, of abell having a pivoted hammer, and an arm carryinga pivoted andover-balanced trip stopping against said arm and arranged to engage thebell-hammer, said arm swivelcd to move laterally and take 20 the tripout of operative relation with the said hammer and spring-actuated to anupright position, one of said parts--viz.,the bell or arinfastened tothe door and the other stationarily located.

3. The combination, with a door, drawer, or similar movable part, of abell having a post with a pin extending transversely therethrough, and ahammer in one piece comprising an arm pivoted on said pin and having aclapper at one end and a loop at the opposite end, and a spring coiledon a pin and its end fastened in the post, and a trip for engaging saidloop, substantially in the manner and for the purpose described.

In testimony whereof I afiix my signature in the presence of twoWitnesses.

JOEL II. \VELLER.

\Vitnesses:

I. F. Yosr, L. P. G. FEGLEY.

